We already know how much editing and processing goes on with popular music. I think that we can all agree that classical music is held to the highest standard when it comes to fidelity of the recording. This one gives a clue about behind-the-scenes processes of classical music recordings. Also a tasty bit near the end where an R&B drummer and classical musician judge... let me not spoil it!
https://www.youtube.com/watch?v=o2P_dRbYn_4
https://www.youtube.com/watch?v=o2P_dRbYn_4